Kinetics and Thermodynamics of Cr(VI), Cu(II), and Ni(II) Adsorption on Activated Carbon Prepared from Rice Hulls

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dc.authoridKilic, ismail/0000-0002-3270-063X
dc.authorwosidKilic, ismail/I-5823-2019
dc.contributor.authorBayrak, Yuksel
dc.contributor.authorTopallar, Harika
dc.contributor.authorKaragoz, Buse
dc.contributor.authorKilic, Ismail
dc.date.accessioned2024-06-12T10:50:49Z
dc.date.available2024-06-12T10:50:49Z
dc.date.issued2013
dc.departmentTrakya Üniversitesien_US
dc.description.abstractFirst, activated carbon was prepared by various ammonium compounds such as NH4NO3, NH4Cl, NH4Br, NH4I, NH4HCO3, and (NH4)(2)HPO4. The pore properties such as surface areas, pore volumes and pore sizes of them were compared under same activation conditions (600 degrees C, 5g of rice hull, 20g of ammonium compound, within a half-hour activation time). The highest surface area by Brunauer-Emmett-Teller (BET) method was obtained as 456.7667m(2)g(-1) by ammonium nitrate compared to other ammonium compounds, and then the kinetics and thermodynamics of Cr(VI), Cu(II), and Ni(II) ions removal from aqueous solutions on this activated carbon were studied. The adsorption data was found to follow second order kinetic model to explan the kinetics of Cr(VI), Cu(II), and Ni(II) ions adsorption, and rate constants were evaluated with the help of this kinetic model. Activation energy and other activation thermodynamic parameters (S, H, and G) were determined by means of the rate constants at different temperatures. Equilibrium data were fitted to the Langmuir and Freundlich adsorption isotherms. Freundlich isotherm best fits the experimental results. Thermodynamic parameters such as K-C, G, H, and S were also calculated. The positive value of S and negative values of G showed the spontaneous of this adsorption system, while the positive value of H pointed out this is an endothermic process.en_US
dc.identifier.doi10.1080/01932691.2012.743347
dc.identifier.endpage1256en_US
dc.identifier.issn0193-2691
dc.identifier.issue9en_US
dc.identifier.scopus2-s2.0-84883389006en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage1248en_US
dc.identifier.urihttps://doi.org/10.1080/01932691.2012.743347
dc.identifier.urihttps://hdl.handle.net/20.500.14551/18143
dc.identifier.volume34en_US
dc.identifier.wosWOS:000323477700009en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTaylor & Francis Incen_US
dc.relation.ispartofJournal Of Dispersion Science And Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAdsorptionen_US
dc.subjectAmmonium Nitrateen_US
dc.subjectKineticsen_US
dc.subjectRice Hullen_US
dc.subjectThermodynamicsen_US
dc.subjectPolyacrylamide-Grafted Sawdusten_US
dc.subjectChromium Iii Ionen_US
dc.subjectAqueous-Solutionen_US
dc.subjectRemovalen_US
dc.subjectAshen_US
dc.subjectEquilibriumen_US
dc.subjectCopperen_US
dc.titleKinetics and Thermodynamics of Cr(VI), Cu(II), and Ni(II) Adsorption on Activated Carbon Prepared from Rice Hullsen_US
dc.typeArticleen_US

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